Be sure and quarantine these chickens for 30 days from any others that you have in case they may have something contagious. Is there any nasal drainage or foam in the eyes? Respiratory diseases are very contagious, and some may make carriers of your flock. Have you contacted the breeder about their symptoms? Antibiotics such as Tylan or oxytetracycline can treat symptoms in some respiratory diseases, but you don't want to bring chickens into your flock that have diseases.

Be sure and quarantine these chickens for 30 days from any others that you have in case they may have something contagious. Is there any nasal drainage or foam in the eyes? Respiratory diseases are very contagious, and some may make carriers of your flock. Have you contacted the breeder about their symptoms? Antibiotics such as Tylan or oxytetracycline can treat symptoms in some respiratory diseases, but you don't want to bring chickens into your flock that have diseases.

Ok we will be sure to quarantine them! Also, we have called the breeder but no answer. And their is no sign of illness besides the coughing and sneezing, she looks very healthy!

Infectious bronchitis, infectious coryza, mycoplasma gallisepticum (MG,) and ILT are the more common respiratory diseases. There is also aspergillosis from mold. Chickens can sneeze from dust, feed, and other irritants. Good luck with your new chickens, and remember to get them tested if you see any disease symptoms, since many can make carriers of the whole flock when combined. Here is a good link to read about the most common diseases including the ones above: http://edis.ifas.ufl.edu/ps044

I would start some antibiotics mentioned in post #2, and I would make sure that she is kept warm, either inside or with a heat lamp. Make sure that she is drinking well. If not Tylan 50 injectable can be given orally 1/4 ml for a bantam twice a day for 5 days.

I would start some antibiotics mentioned in post #2, and I would make sure that she is kept warm, either inside or with a heat lamp. Make sure that she is drinking well. If not Tylan 50 injectable can be given orally 1/4 ml for a bantam twice a day for 5 days.